PRODUCT HIGHLIGHTS: 12-Inch-Long Matte Box Safety Chain Ultra-Durable: Nylon Paracord Stainless Steel Hardware 1/4-20" Screw & Swiveling Spring Loaded Clip Lifetime Warranty PRODUCT DESCRIPTION: Clamp-on matte boxes are the most common type of matte box now used in the industry. To make sure you are not accidentally dropping it while changing filters or lenses a matte box safety chain is critical. Our KONDOR BLUE Matte Box system features a built-in loop to use safety chains made from nylon paracord to secure your matte box to your cage or rig to prevent accidents or when filming in precarious scenarios. TECH SPECS: Weight: 2 oz Length: 12" (Not Including Hardware) Thickness: OD 12.75mm